
\tikzset{
    bold/.style={
        fill=blue!10, 
        draw=red, 
        line width=2pt
    },    
    normal/.style={
        fill=blue!10, 
        draw=black, 
        line width=0.5pt
    },
    dotted/.style={
        fill=gray!10, 
        draw=black, 
        line width=0.5pt, 
        dashed, 
        thin
    },
    arrow/.style={
        very thick,
        shorten <=1pt,
        shorten >=1pt
    }
}